This standard is issued under the fixed designation C ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee C- 16 on. ASTM C () Standard Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box Apparatus. Annual. Our calibrated hot box is one of the largest in the country accepting test assemblies up to 9’x16′. Its design allows any orientation from fully vertical to fully .

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You may delete a document from your Alert Profile at any time. It accommodates test specimens up to 9 feet by 16 feet.

Additional characterization is required to insure that all aspects of the heat flow and storage are accounted for during the test. By performing this benchmarking process, the hot box operator is able to develop the additional equations that predict the magnitude of the corrections to the net heat flow through the specimen that account for any hot box wall loss and flanking asym.

For ceiling tests with low density insulations, the minimum lateral dimension of asmt specimen shall be at least several times the dimension of the expected convection cells. Data obtained by the use of this test method is representative of the specimen performance only for the conditions of the test. Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world.

When constructed to measure heat transfer in the vertical direction, the c11363 box is used for testing roof, ceiling, floor, and other horizontal structures. Reflective technology increases the overall thermal resistance of the building enclosure when used to insulate poured concrete structures. The direction of airflow motion under forced convective conditions shall be either perpendicular or parallel to the surface.

The preconditioning parameters shall be chosen to accurately reflect the test samples intended use and shall be documented in the report. Any exterior wall or roof asstm, including steel stud wall systems, insulated concrete forms, tilt-up concrete walls, and insulated metal panels. The operation of a hot box apparatus requires a significant number of fundamental measurements of temperatures, areas and power.


The operation of a hot box apparatus requires a significant number of fundamental measurements of temperatures, areas and power. For adtm information on our thermal testing capabilities click here.

The general principles of the hot box method c13633 be used to construct an apparatus to measure the heat flow through industrial systems at elevated temperatures. Any exterior wall or roof assembly, including steel stud wall systems, astj concrete forms, tilt-up concrete walls, and insulated metal panels Test Procedure: The report shall contain a warning stating that the use of the barriers might modify the heat transfer through the system causing significant errors.

ASTM C1363

This test is applicable to large c13633, such as walls and roofs. Note c163 the use of Test Method C or similar apparatus creates additional uncertainty since those devices are calibrated using transfer standards or standard reference materials.

This test method applies to building structures or composite assemblies of building materials for which it is possible to build a representative specimen that fits the test apparatus. Formally confirming that your products and services meet all trusted external and internal standards.

During initial setup and periodic verification testing, each measurement system and sensor is calibrated against a standard traceable to a national standards laboratory. We have no amendments or corrections for this standard. For the results to be representative of a building construction, only representative sections shall be tested.

Approximately thermocouples measure air and surface temperatures on both sides of the Hot Box. This test method does not establish test conditions, specimen configuration, or data acquisition details but leaves these choices to be made in a manner consistent with the specific application being considered.

Consider the typical residential wall, which consists of a wood frame with fiberglass insulation between the studs, sheathing, a weather c1633 barrier, drywall on the qstm walls, and exterior siding.

Home Innovation ASTM C Hot Box | Home Innovation Research Labs

Finally, heat flow in this scenario is a three-dimensional phenomenon. Please first log in with a verified email before subscribing to alerts. Some hot boxes are limited to planar or nearly planar specimens. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world.


Temperatures are maintained in the two rooms until steady-state conditions have been met for temperature on both sides and energy input to the warm side. To adjust for any energy that goes through the Hot Satm walls c13363 tries to bypass through the specimen frame, we calibrate the box.

However, larger hot boxes have been used to characterize projecting skylights and attic sections. This standard is not included in any packages. Other orientations are also permitted. Direct current DC power is used to power both the heater and the fans as DC current provides a more accurate measurement of the power input.

Proceed to Checkout Continue Shopping. By running multiple conditions, we develop a calibration curve and use it to provide accurate results. Please enter a valid email address. Global Reach Intertek is the industry leader asym over 42, people in 1, locations in over countries.

Materials with a low thermal emittance surface have been used for many years to create reflective insulations that reduce the rate of heat flow across building envelopes.

However, several hot box apparatuses have been operated under dynamic non-steady-state conditions after additional characterization 1. Since this test method is used to determine the total heat flow through the test area demarcated by the metering box, it is possible to determine the heat flow through a building element smaller than the test area, such as a window or representative area of a panel unit, if the parallel heat flow through the remaining surrounding area is independently determined.

These data show that reductions in heat transfer across the building enclosure can be effectively reduced by the use of enclosed reflective air spaces and attic radiant barriers. These panels, or representative c3163 of the panels, have had their thermal performance measured on other devices that are directly traceable or have been favorably compared to a national standards laboratory.